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Catalytic activities and mechanism of formaldehyde oxidation over gold supported on MnO2 microsphere catalysts at room temperature

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Frontiers of Environmental Science & Engineering 2016年第3期10卷 447-457页

作者： guanglong pang Donghui WANG Yunhong ZHANG Chunyan MA Zhengping HAO Institute of Chemical Physics School of Chemistry Beijing Institute of Technology Beijing 100081 China Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Research Institute of Chemical Defense Beijing 100191 China

MnO2 microspheres with various surface structures were prepared using the hydrothermal method, and Au/MnO2 catalysts were synthesized using the sol-gel method. We obtained three MnO2 microspheres and Au/MnO2 samples： coherent solid spheres covered with wire-like nanostructures, solid spheres with nanosheets, and hierarchical hollow microspheres with nanoplatelets and nanorods. We investigated the properties and catalytic activities of formaldehyde oxidation at room temperature. Crystalline structures of MnO2 are the main factor affecting the catalytic activities of these samples, and γ- MnO2 shows high catalytic performance. The excellent redox properties are responsible for the catalytic ability of γ-MnO2. The gold-supported interaction can change the redox properties of catalysts and accelerate surface oxygen species transition, which can account for the catalytic activity enhancement of Au/MnO2. We also studied intermediate species. The dioxymethylene （DOM） and formate species formed on the catalyst surface were considered intermediates, and were ultimately transformed into hydrocarbonate and carbonate and then decomposed into CO2. A proposed mechanism of formaldehyde oxidation over Au/MnO2 catalysts was also obtained.

关键词： MnO2 microspheres Au/MnO2 formaldehyde oxidation γ-MnO2

Layered sphere-shaped TiO_2 capped with gold nanoparticles on structural defects and their catalysis of formaldehyde oxidation

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Journal of Environmental Sciences 2016年第1期28卷 77-85页

作者： Chunyan Ma guanglong pang Guangzhi He Yang Li Chi He Zhengping Hao Department of Environmental Nano-materials Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Department of Environmental Science and Engineering State Key Laboratory of Multiphase Flow in Power EngineeringSchool of Energy and Power Engineering Xi'an Jiaotong University

We describe here a one-step method for the synthesis of Au/TiO2 nanosphere materials,which were formed by layered deposition of multiple anatase TiO2 *** Au nanoparticles were stabilized by structural defects in each TiO2 nanosheet,including crystal steps and edges,thereby fixing the Au-TiO2 perimeter *** transfer occurred along the gaps between these TiO2 nanosheet layers and in contact with catalytically active sites at the Au-TiO2 *** doped Au induced the formation of oxygen vacancies in the Au-TiO2 *** vacancies are essential for generating active oxygen species（-＊O^-） on the TiO2 surface and Ti^3＋ ions in bulk *** ions can then form Ti^3＋-O^--Ti^4＋species,which are known to enhance the catalytic activity of formaldehyde（HCHO） *** studies on structural and oxygen vacancy defects in Au/TiO2 samples provide a theoretical foundation for the catalytic mechanism of HCHO oxidation on oxide-supported Au materials.

关键词： Layered Au/TiO2 nanospheres Structural defects Oxygen vacancy defects Reaction mechanism Formaldehyde oxidation

Image format pipeline and instrument diagram recognition method based on deep learning

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Biomimetic Intelligence & Robotics 2024年第1期4卷 36-44页

作者： Guanqun Su Shuai Zhao Tao Li Shengyong Liu Yaqi Li guanglong Zhao Zhongtao Li Shandong Qingniao IIoT Co. ltd.Jinan 250014China Jinan Housing and Urban-Rural Development Bureau Jinan 250012China State Grid Shandong Electric Extrahigh Voltage Company Jinan 250018China School of Information Science and Engineering University of JinanJinan 250022China

In this study,we proposed a recognition method based on deep artificial neural networks to identify various elements in pipelines and instrumentation diagrams(P&ID)in image formats,such as symbols,texts,and ***,the P&ID image format is recognized manually,and there is a problem with a high recognition error rate;therefore,automation of the above process is an important issue in the processing plant *** China National Offshore Petrochemical Engineering *** the image set used in this study,which contains 51 P&ID drawings in the *** converted the PDF P&ID drawings to PNG P&IDs with an image size of 8410×*** addition,we used labeling software to annotate the images,divided the dataset into training and test sets in a 3:1 ratio,and deployed a deep neural network for *** method proposed in this study is divided into three *** first step segments the images and recognizes symbols using YOLOv5+*** second step determines text regions using character region awareness for text detection,and performs character recognition within the text region using the optical character recognition *** third step is pipeline recognition using YOLOv5+*** symbol recognition accuracy was 94.52%,and the recall rate was 93.27%.The recognition accuracy in the text positioning stage was 97.26%and the recall rate was 90.27%.The recognition accuracy in the character recognition stage was 90.03%and the recall rate was 91.87%.The pipeline identification accuracy was 92.9%,and the recall rate was 90.36%.

关键词： Deep learning Image processing Piping and instrumentation Object recognition Pipeline recognition

Crosstalk between glioblastoma and tumor microenvironment drives proneural–mesenchymal transition through ligand-receptor interactions

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Genes & Diseases 2024年第2期11卷 874-889页

作者： Yancheng Lai Xiaole Lu Yankai Liao Pei Ouyang Hai Wang Xian Zhang guanglong Huang Songtao Qi Yaomin Li Department of Neurosurgery Institute of Brain DiseaseNanfang HospitalSouthern Medical UniversityGuangzhouGuangdong 510515China Laboratory for Precision Neurosurgery Nanfang HospitalSouthern Medical UniversityGuangzhouGuangdong 510515China

Glioblastoma(GBM)is the most common intrinsic and aggressive primary brain tumor in adults,with a median survival of approximately 15 *** heterogeneity is considered responsible for the treatment resistance and unfavorable ***-mesenchymal transition(PMT)represents GBM malignant progression and recurrence,which might be a breakthrough to understand GBM heterogeneity and overcome treatment *** is a complicated process influenced by crosstalk between GBM and tumor microenvironment,depending on intricate ligand-receptor *** this review,we summarize the autocrine and paracrine pathways in the GBM microenvironment and related ligand-receptor interactions inducing *** also discuss the current therapies targeting the PMT-related autocrine and paracrine ***,this review offers a comprehensive understanding of the failure of GBM-targeted therapy and ideas for future tendencies of GBM treatment.

关键词： Autocrine Glioblastoma Ligand-receptor interaction Microenvironment Paracrine Proneural-mesenchymal transition

Recent advances in memristors based on two-dimensional ferroelectric materials

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Frontiers of physics 2024年第1期19卷 195-218页

作者： Wenbiao Niu guanglong Ding Ziqi Jia Xin-Qi Ma JiYu Zhao Kui Zhou Su-Ting Han Chi-Ching Kuo Ye Zhou Institute for Advanced Study Shenzhen UniversityShenzhen 518060China College of Electronics and Information Engineering Shenzhen UniversityShenzhen 518060China Institute of Organic and Polymeric Materials Research and Development Center of Smart Textile TechnologyTaipei University of TechnologyTaipei 10608TaiwanChina

In this big data era, the explosive growth of information puts ultra-high demands on the data storage/computing, such as high computing power, low energy consumption, and excellent stability. However, facing this challenge, the traditional von Neumann architecture-based computing system is out of its depth owing to the separated memory and data processing unit architecture. One of the most effective ways to solve this challenge is building brain inspired computing system with in-memory computing and parallel processing ability based on neuromorphic devices. Therefore, there is a research trend toward the memristors, that can be applied to build neuromorphic computing systems due to their large switching ratio, high storage density, low power consumption, and high stability. Two-dimensional (2D) ferroelectric materials, as novel types of functional materials, show great potential in the preparations of memristors because of the atomic scale thickness, high carrier mobility, mechanical flexibility, and thermal stability. 2D ferroelectric materials can realize resistive switching (RS) because of the presence of natural dipoles whose direction can be flipped with the change of the applied electric field thus producing different polarizations, therefore, making them powerful candidates for future data storage and computing. In this review article, we introduce the physical mechanisms, characterizations, and synthetic methods of 2D ferroelectric materials, and then summarize the applications of 2D ferroelectric materials in memristors for memory and synaptic devices. At last, we deliberate the advantages and future challenges of 2D ferroelectric materials in the application of memristors devices.

关键词： two-dimensional ferroelectric materials synthesis strategies memristors artificial synapses

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数学多元论与贝纳塞拉夫问题

哲学动态 2024年第3期 79-90页

作者：罗广龙德国康斯坦茨大学哲学系

数学多元论(或集合论多宇宙论)是近年来数学哲学中逐渐流行的哲学立场。数学多元论具有不同的数学与哲学动机,其中哲学上的一个重要动机是解决传统实在论者面临的贝纳塞拉夫问题。根据多元论,任何一致的理论都现实为真,因此对数学信念... 详细信息

数学多元论(或集合论多宇宙论)是近年来数学哲学中逐渐流行的哲学立场。数学多元论具有不同的数学与哲学动机,其中哲学上的一个重要动机是解决传统实在论者面临的贝纳塞拉夫问题。根据多元论,任何一致的理论都现实为真,因此对数学信念可靠性的解释可以转化为对一致性信念的解释。许多哲学家也认为数学多元论是唯一能够应对贝纳塞拉夫挑战的实在论立场。然而事实上,多元论者的一致性概念是个不稳定的概念,诉诸一致性并不能解决传统实在论者面临的认识论问题。

关键词：数学多元论集合论多宇宙论贝纳塞拉夫问题一致性

“体制化能动”:国家定纷止争的本土实践逻辑

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公共行政评论 2024年第5期17卷 104-123,198,199页

作者：汪广龙杜超峰中国海洋大学国际事务与公共管理学院

活力和秩序有机统一的必要前提,是构建国家秩序治理的边界,避免其对活力的“恣意”干预。现有理论将国家介入社会纠纷的边界诉诸于程序政治和形式理性,但该逻辑与转型中的治理现实存在明显断裂。论文发现,国家介入纠纷解决的本土实践,... 详细信息

活力和秩序有机统一的必要前提,是构建国家秩序治理的边界,避免其对活力的“恣意”干预。现有理论将国家介入社会纠纷的边界诉诸于程序政治和形式理性,但该逻辑与转型中的治理现实存在明显断裂。论文发现,国家介入纠纷解决的本土实践,不是国家简单提升损益的干预力度和规则刚性,而是强调以行政统合全面吸纳诉求并构建整体同意;不是被动守住底线预期,而是通过形式法治主动嵌入社会,确保多元规则体系的整体可靠;不仅是从外部协助推进妥协与协商,更是以总体领导推动信任、交往与合作的良性循环。文章认为,这些多样和特殊的本土调适背后,呈现的是“体制化能动”的实践逻辑,这构成国家介入纠纷解决的清晰指引和可靠约束。

关键词：活力与秩序边界纠纷解决本土实践

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“陈试剂”作为三氟甲基源机理的理论研究

化学学报 2024年第2期82卷 132-137页

作者：黄广龙薛小松中国科学院上海有机化学研究所先进氟氮材料重点实验室上海200032

FSO_(2)CF_(2)CO_(2)Me(MFSDA)是陈庆云院士课题组于1989年开发的一种十分有效的三氟甲基化试剂,在学术界和工业界有着广泛地应用,是我国有机氟化学领域早期最重要的研究成果之一,该试剂也被命名为“陈试剂”.此研究采用密度泛函理论(D... 详细信息

FSO_(2)CF_(2)CO_(2)Me(MFSDA)是陈庆云院士课题组于1989年开发的一种十分有效的三氟甲基化试剂,在学术界和工业界有着广泛地应用,是我国有机氟化学领域早期最重要的研究成果之一,该试剂也被命名为“陈试剂”.此研究采用密度泛函理论(DFT)方法研究了碘化亚铜介导“陈试剂”形成三氟甲基亚铜的反应机理.计算结果揭示了反应中碘化亚铜催化剂的双重作用:一方面碘负离子通过进攻“陈试剂”中具有亲电性的甲基启动反应;另一方面一价铜阳离子络合物捕获原位生成二氟卡宾形成二氟卡宾亚铜中间体.发现与过去普遍假设的机理不同,(1)关键的脱羧过程并不需要一价铜阳离子参与,(2)三氟甲基是通过二氟卡宾亚铜中间体与氟离子络合后形成,而非二氟卡宾直接捕获氟离子.研究结果丰富了对“陈试剂”形成三氟甲基源的认识,为进一步开发基于“陈试剂”的新反应提供了理论依据.

关键词：密度泛函理论(DFT)方法氟磺酰二氟乙酸甲酯陈试剂三氟甲基化试剂反应机理

学术资本主义思潮下大学教师学术职业的理性审思

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现代教育管理 2024年第7期 55-62页

作者：郝广龙黄培森成都师范学院四川成都611130 四川文理学院四川达州635000

在学术资本主义思潮的冲击下,大学教师正面临“立德树人者”与“知识雇佣者”、“求真型学者”与“求利型学者”、“服务社会者”与“资本追逐者”、“引领文化者”与“迎合文化者”的学术职业冲突,导致大学教师“立德树人者”形象的式... 详细信息

在学术资本主义思潮的冲击下,大学教师正面临“立德树人者”与“知识雇佣者”、“求真型学者”与“求利型学者”、“服务社会者”与“资本追逐者”、“引领文化者”与“迎合文化者”的学术职业冲突,导致大学教师“立德树人者”形象的式微、“知识创生者”旨趣的偏失、“学术创业者”动机的异化和“价值引领者”取向的偏离。厘定学术与资本的边界,消解学术职业危机,大学教师应坚守立德树人的教育初心,恪守学术为本的职业根基,谨守学术创业的发展航向,坚守文化学人的责任担当,优化学术职业发展的制度环境。

关键词：学术资本主义大学教师学术职业学术创业制度环境

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